ARI Timer is a specific type of simple, electronic countdown timer used by healthcare professionals to measure and count the respiratory rate (breaths per minute) of children to help diagnose Acute Respiratory Infections (ARIs) and pneumonia. These devices are activated with a button, provide a single audible beep to signal the start of a 60-second countdown, and then produce a double beep at the 60-second mark to indicate the measurement period is complete. A flashing red light often accompanies the countdown, and the user counts the number of breaths taken during the 60-second interval to determine the patient's respiratory rate.